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I just bought a cheap Thunderbolt to VGA conversor, for a macbook pro. It didn't work at all so I decided to open the case. I found a silicon lump and most of the cables just hanging there.

Just as an exercise, I want to sort out which cables I need to solder onto which pins. Here are some pictures with what I got.

DP to VGA back

DP to VGA front

I've looked for VGA pinout and Thunderbolt pinout. Also found this link about Apple's MiniDisplay port, but I really don't have much clue where to look next.

Update 1

Here's a picture showing chip information on the board. As mentioned on the comments, my bet is that this is a standard DisplayPort to VGA conversor board. But I haven't found any info on it.

Chip detail

Text on chips:

Big chip (Parade):

PSB617
A0
UOBCAC
0807H
C 1420

SmallerChip (BergMicro):

25Q40ASTCG
1406

Update 2

The Parade chip/board is described here: www.paradetech.com/products/displayport-format-converters/ps8617/ (not enough rep to post more links).

I believe the first question to answer is the cable color correspondence of the ThunderBolt end, I don't know if there's a standard, or if that's possible without tearing the wire apart.

Sergio Basurco
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1 Answers1

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The number that is shown next to each pads, is the pin number of a normal sized displayport connector. You can find the relation between the normal and mini sized connector at wikipedia. Next you have to identify the numbering for for each wire - for that you can use a multimeter.

Ramhound
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Frederico
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